272 Mr. C. H. B. Grant on a Collection of 



River, 223 ; Bahr el Ghazal, 219, 216 ; Sudan, 250, 234, 

 230, 224, 223, 219; Abyssinia, 238, 227, 226, 221, 219; 

 South Arabia, 251, 235; Uganda, 223, 222; British East 

 Africa, 229, 228, 223, 222 ; Nyasaland, 209, 208, 206 ; 

 Zambesi, 226, 221, 212, 200; Mashonaland, 234, 222, 214, 

 211, 208 ; Damaraland, 225, 222, 219 ; Bechuanaland, 237 ; 

 Transvaal, 224, 218, 213, 211 mm. 



It will be seen that cousiderable variation exists in size 

 in birds from the same locality, as, for instance, the tM'o 

 from Nigeria, the six from the Sudan, and the four from the 

 Zambesi ; specimens from the first and the last localities 

 overlapping Mr. Austin Roberts' measurement. 



143. Lophoceros erythrorhynchus erythrorhynchus. Red- 

 billed Ilorubill. 



Buceros erythrorhynchus Temm. PI. Col. 36'" Livraison, 

 1823, sp. 19: Senegal. 



a. S ' 40 miles N.W. of Nakuro, 4200 ft. Dec. 23. 



Total length in flesh: 17^ inches. Wing: 177 mm. 



[Irides greyish yellow ; bill red, base white ; legs and 

 toes black. Common.] 



A worn and faded specimen and in moult. This is a small- 

 billed bird, and I am by no means sure that it is really fully 

 adult. 



In naming this specimen I have carefully examined the 

 whole series in the National Collection, and can divide them 

 into two well-marked races as follows : — 



LoPHOCEROS ERYTHRORHYNCHUS ERY^THRORHYNCHUS Temm. 



op. cit. 



Having the oar on the outer tail-feathers confined to the 

 outer web, a well-marked white streak over the eye in the 

 majority of specimens, and having on the average more 

 white on the middle secondaries. 



Range. Senegal to the Niger, east through northern 

 Belgian Congo to Abyssinia, Sudan, Somaliland^ Uganda, 

 and British East Africa. 



